Mac OSX - What format to use for an external hard drive?

I am using Mac OS Mojave and have a new WD MyPassport Drive. (It is a non-SSD external drive.)

The drive will load but can't be written, so I need to think I need to format it.


What format should I use?


I plan to update to a future OS one day in the future, so I would like a format that works with both Mojave and future OS.


Disk Utility gives me the following options:

  • APFS (including encrypted and case sensitive options)
  • Mac OS Extended Journaled (including encrypted and case sensitive options)
  • MS-DOS Fat
  • ExFat


It also asks for a "Scheme"

  • GUID Partition Map
  • Master Boot Record
  • Apple Partition Map

Which scheme do I pick?


What I plan to use the drive for:

It will be used to store a variety of files. I only plan to view the files on my Mac (by copying the files on the mac, so I won't run them from the drive). I will only access the files a few times a year. Some of the files are very large, so if there is an option that improves speed of copying, that would be good. Because I only plan it to use on Mac, then I don’t need the flexibility of compatibility with other OSes that ExFat brings. However, if the other formats, don’t offer any significant benefit over ExFat, then I guess I should use ExFat for future proofing?


I do not plan to use the drive for Timemachine or to use as a boot drive (as I have another drive for that)


Thanks!

Posted on Feb 7, 2021 7:46 AM

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Posted on Feb 7, 2021 7:56 AM

non system volume then Mac OS extended Journaled, GUID Can be used all the way to Big Sur. That's what I use on all my data volumes. If I'm going to install macOS on a SSD or NVME then APFS with GUID specifically for High Sierra, Mojave, Catalina and Big Sur. Previous macOS will have trouble with this setup. Should use Mac OS Extended Journaled with GUID.

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Feb 7, 2021 7:56 AM in response to big_smile

non system volume then Mac OS extended Journaled, GUID Can be used all the way to Big Sur. That's what I use on all my data volumes. If I'm going to install macOS on a SSD or NVME then APFS with GUID specifically for High Sierra, Mojave, Catalina and Big Sur. Previous macOS will have trouble with this setup. Should use Mac OS Extended Journaled with GUID.

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Mac OSX - What format to use for an external hard drive?

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